From 3974c202cf36fbba55273e7e2c83d337eff7c0c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hu=C3=A1ng=20J=C3=B9nli=C3=A0ng?= <jlhwung@gmail.com>
Date: Thu, 10 Jun 2021 09:43:43 -0400
Subject: [PATCH] fix: avoid pushing double tc.brace after tt.braceL

---
 packages/babel-parser/src/plugins/jsx/index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/babel-parser/src/plugins/jsx/index.js b/packages/babel-parser/src/plugins/jsx/index.js
index ca06064682dc..99e1e62b1956 100644
--- a/packages/babel-parser/src/plugins/jsx/index.js
+++ b/packages/babel-parser/src/plugins/jsx/index.js
@@ -614,7 +614,6 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     }
 
     updateContext(prevType: TokenType): void {
-      super.updateContext(prevType);
       const { context, type } = this.state;
       if (type === tt.braceL) {
         const curContext = context[context.length - 1];
@@ -622,6 +621,8 @@ export default (superClass: Class<Parser>): Class<Parser> =>
           context.push(tc.brace);
         } else if (curContext === tc.j_expr) {
           context.push(tc.templateQuasi);
+        } else {
+          super.updateContext(prevType);
         }
         this.state.exprAllowed = true;
       } else if (type === tt.slash && prevType === tt.jsxTagStart) {
@@ -643,6 +644,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         this.state.exprAllowed = false;
       } else {
         this.state.exprAllowed = type.beforeExpr;
+        super.updateContext(prevType);
       }
     }
   };